Use npm script to build & publish doc

Makefile

@@ -47,18 +47,10 @@ coverage:
 	npm run coverage
 
 doc:
-	rm -rf ./apidoc
-	ndoc --link-format "https://github.com/{package.repository}/blob/${CURR_HEAD}/{file}#L{line}"
+	npm run doc
 
-gh-doc: doc
-	touch ./apidoc/.nojekyll
-	cd ./apidoc \
-		&& git init . \
-		&& git add . \
-		&& git commit -m "Auto-generate API doc" \
-		&& git remote add remote git@github.com:markdown-it/markdown-it.git \
-		&& git push --force remote +master:gh-pages
-	rm -rf ./apidoc
+gh-doc:
+	npm run gh-doc
 
 publish:
 	@if test 0 -ne `git status --porcelain | wc -l` ; then \

package.json

@@ -19,7 +19,9 @@
     "lint": "eslint .",
     "test": "npm run lint && nyc mocha && node support/specsplit.js test/fixtures/commonmark/spec.txt",
     "coverage": "npm run test && nyc report --reporter html",
-    "report-coveralls": "nyc report --reporter=text-lcov | coveralls"
+    "report-coveralls": "nyc report --reporter=text-lcov | coveralls",
+    "doc": "node support/build_doc.js",
+    "gh-doc": "npm run doc && gh-pages -d apidoc -f"
   },
   "files": [
     "index.js",
@@ -43,6 +45,7 @@
     "coveralls": "^3.0.4",
     "eslint": "^6.0.1",
     "express": "^4.14.0",
+    "gh-pages": "^2.2.0",
     "highlight.js": "^9.2.0",
     "markdown-it-abbr": "^1.0.4",
     "markdown-it-container": "^2.0.0",
@@ -59,6 +62,7 @@
     "ndoc": "^5.0.0",
     "nyc": "^15.0.1",
     "pug-cli": "^1.0.0-alpha6",
+    "shelljs": "^0.8.4",
     "stylus": "^0.54.5",
     "supertest": "^4.0.2",
     "terser": "^4.1.2"

support/build_doc.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+
+'use strict';
+
+/* eslint-env es6 */
+
+const shell = require('shelljs');
+
+shell.rm('-rf', 'apidoc');
+
+const head = shell.exec('git show-ref --hash HEAD').stdout.slice(0, 6);
+
+const link_format = `https://github.com/{package.repository}/blob/${head}/{file}#L{line}`;
+
+shell.exec(`node node_modules/.bin/ndoc --link-format "${link_format}"`);